Heating-drum.



No. 650,965, Patented June 5, I900. H. S. CAMPBELL.

HEATING DRUM.

(Application filed Aug. 35, 1899,)

(No Model.)

FIG. 2

FIG 1 FIG.3.

wigjV/ZNTOR BY ATTORNEYS.

WITNESSES Narnia STATES PATENT OFFICE.

l'IOlVARD S. CAMPBELL, OF BALTIMORE, MARYLAND.

HEATING-DRUM.

SPECIFICATION forming part of Letters Patent No. 650,965, dated J une 5,'1 900; Applicatio iifiled August 25, 1899. Serial No. 728,483. Wemodel.)

To Ml whom it may comm t.-

Be it known that I, HOWARD S. CAMPBELL, a citizen of theUnited'States,residing at Baltimore, in the State of Maryland, haveinvented certain new and useful Improvements in Heating-Drums, of whichthe following is a specification.

This invention relates to improvements in heating-drums, and isparticularly adapted for use on oil and gas stoves.

One object of the invention is to provide a drum of such a constructionthat the air will be compelled to take a circuitous route through theseveral passages and chambers, thereby retaining the air within the druma sufficient time to allow it to become superheated before it isexpelled therefrom.

A further object of the invention is to so arrange the severaldeflectors within the drum that the hot air will come in contact withall the parts of the said drum and radiate an intense heat. I

Other features of the invention will be fully set forth in the followingdescription of the accompanying drawings, in which Figurel is a sideelevation of the improved device. Fig. 2 is a vertical section of thesame. and Fig. 3 is a modification of the lower shell,

In the accompanying drawings, 1 designates a shell having preferably aconical contour, and 2 designates a shell which fits partly over and isapproximately the same as the shell 1.

The shell 1 has its wall inclined, so that the diameter of the openingat the top will be considerably less than that of the opening at thebottom. Thereby the shell 1 will be kept full of hot air at all timesduring the use of the drum. A shell 3 is fitted over the shell 1 and hasits lower end resting on the outer wall of the shell 1, as shown in Fig.2, and is secured thereto by rivets or other suitable means. The wall ofthe shell 3 inclines outwardly and extends nearly to the wall of theshell 2. A'deflector 4 is suspended within the shell 3 by metal strips5. The diameter of the deflector 4 is slightly less than that of theshell 3, thereby leaving a passage 6 between the two.

The shell 2 is approximately the same shape as shell 1, the formerfitting partly over the latter and being held in position by the arms 7,leaving a passage 8 between the two. Near the top the shell 2 isprovided with a partitioii 9, having an opening 10 through the center.

The operation of the device is as follows: The shell 1 is placed asuitable distancesay two or three inches-from the burner of the stove.The air will take the course shown by the darts. As the heated airpasses out the opening at the top of the shell 1 it strikes thedeflector 4 and-is forced downward against the sides of the shell 3 andout the passage 6, thereby keeping the walls of the shell 3 thoroughlyheated at all times. The partially-heated air as it passes along thepassage 8 will contact with the sides of the shell 3 and be thoroughlyheated before it enters the chamber 11, where it commingles with thesuperheated air from the shell 3, and the two fluids pass off throughthe opening 10 of the partition 9 to the atmosphere.

Fig. 3 shows a modification of shell 1 having a contracted neck 12,thereby dispensing with the shell 3. In this modification the deflector4 is suspended within the top of the shell, just above the contractedneck 12, as shownby dotted lines.

- It will be seen that by the arrangement of the parts as herein shownthe superheated air will beheld within the drum sufficiently long toallow all the parts to be thoroughly heated, thereby radiating anintense heat.

Having thus described my invention, what I claim is- 1. Inaheating-drum, the combination of the shell, 1; the shell, 3, having itslower end resting on the shell, 1, the wall of the shell, 3, being"inclined outward to form a larger opening at the top than at the bottom;a defleetor, 4, suspended within the shell, 3; a shell, 2, surroundingthe shells, 1, and, 3; and means for connecting the said shells 1 and 2.

2. In a heating-drum, the combination of the shell, 1; the shell, 3,having its lower end resting on the shell, 1, below the opening thereof,the said shell, 3, being inclined outward to form a larger opening atthe top than at the bottom; the shell, 2, having a partition, 9, nearthe top provided with an opening, 10; and means, 7, to connect the saidshells, 1, and, 2.

3. In a heating-drum, the combination of the shell, 1; the shell, 3,having its lower end resting upon the shell, 1, the said shell, 3,

having its wall inclined outward to form a larger opening at the topthan at the bottom; the deflector, 4, suspended within the shell, 3; theshell, 2, surrounding the shells, 1, and, 3, and hax'ing a partition, 9,below the top opening; and means to con neet the said shells, 1 and 2.

4. In a heating-drum, the combination of the shell, 1; ashell, 3,integral with the shell, 1; a deflector, 4, suspended above the shell,1, and within the shell, 3; a shell, 2, extending above and surroundingthe shells, 1 and 3; and means, 7, to connect the said shells 1 and 2.

5. In a heating-drum, the combination of the shell, 1; a deflector, 4,suspended above HOVVAHD S. CAMPBELL.

lVitnesses:

CI-IAPIN A. FERGUSON, 1;. F. BoYDEN.

